Water flow timer

ABSTRACT

A water flow timer comprising a main body, a water stopping membrane, a control rod, a bottom cover, a control member, a rotating member, a timing member, and a rotary cap, the timer is mechanically operated in such a way that the rotary cap is turned to actuate the control member to force the control rod to slide, thereby resulting in a gap between the water stopping membrane and a bottom opening of an inner chamber of the main body. The inner and the outer chamber of the main body are thus in communication with each other. As the rotary cap is turned, the torsion spring of the timing member is compressed to provide the rotary cap with a recovery force. The recovery of the rotary cap is delayed by an intermittent gear, so as to control the timing of the water flow.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates generally to a timer, and more particularly to a water flow timer.

[0003] 2. Description of Related Art

[0004] The conventional water flow timer is electronically operated and is therefore rather expensive. In addition, such electronically-operated water flow timer is generally designed for use in a large-scale irrigation of a golf course, farm, or the like. In other words, the conventional water flow timer is not suitable for use as a household item in terms of price and performance.

BRIEF SUMMARY OF THE INVENTION

[0005] The primary objective of the present invention is to provide an inexpensive water flow timer.

[0006] It is another objective of the present invention to provide a water flow timer which is intended for use in a small-scale irrigation.

[0007] It is still another objective of the present invention to provide a mechanically-operated water flow timer.

[0008] The features, functions, and advantages of the present invention will be readily understood upon a thoughtful deliberation of the following detailed description of the present invention with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0009]FIG. 1 shows a perspective view of the present invention.

[0010]FIG. 2 shows an exploded view of the present invention.

[0011]FIG. 3 shows a partial exploded view of the present invention.

[0012] FIGS. 4-7 are sectional views of the present invention.

[0013]FIG. 8 shows a partial schematic plan view of the present invention.

[0014]FIG. 9 shows a partial sectional view of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0015] As shown in FIGS. 1-8, a water flow timer of the present invention comprises a main body 10, a water stopping membrane 30, a control rod 40, a bottom cover 50, a control member 60, a rotating member 70, a timing member 80, and a rotary cap 90.

[0016] The main body 10 is provided with a water admitting tube 11 and a water discharging tube 12, which are in turn provided with a fastening portion 13 engageable with a water pipe. The main body 10 is further provided with an upper chamber 14 and a lower chamber 15. The lower chamber 15 is provided with a water control tank 16 which is located at the juncture of the water admitting tube 11 and the water discharging tube 12 and is divided into an inner chamber 17 and an outer chamber 18. The inner chamber 17 is provided with a through hole 19 in communication with the upper chamber 14. The upper chamber 14 is provided with at least two pivoting holes 20 and a locating slot 22 having a retaining hook 21.

[0017] The water stopping membrane 30 is disposed at the bottom of the inner chamber 17 and the outer chamber 18 such that the top of the water stopping membrane 30 removably seals off a bottom opening 31 of the inner chamber 17. As a result, the inner chamber 17 and the outer chamber 18 can be separated from each other or kept in communication with each other. The periphery of the water stopping membrane 30 is in an intimate contact with the inner wall of the water control tack 16.

[0018] The control rod 40 is pivoted to the center of the water stopping membrane 30 such that the top end of the control rod 40 is jutted out of the upper chamber 14 via the through hole 19 of the top of the inner chamber 17. The control rod 40 has a bottom end which is provided with a stop portion 41 urging the underside of the water stopping membrane 30.

[0019] The bottom cover 50 serves to seal off the bottom of the lower chamber 15 such that a top edge 52 of the center tube 51 is located at the underside of the water stopping membrane 30, and that a spring 53 is disposed between the underside of the center of the center tube 51 and the stop portion 41 of the control rod 40.

[0020] The control member 60 has two pivoting shafts 61 and is pivoted in the upper chamber 14 such that the two pivoting shafts 61 are received in the two pivoting holes 20 of the upper chamber 14. The control member 60 is provided with a press plate 63 which is provided in the top with a protruded block 62 and is opposite in location to the pivoting shafts 61. The press plate 63 is located over the top end of the control rod 40. The control member 60 is further provided with two elastic support arms 64 which are disposed between the two pivoting shafts 61 and the press plate 63 such that the support arms 64 are disposed across the slot opening 23 of the locating slot 22 of the upper chamber 14, thereby enabling the press plate 63 of move up and down in a reciprocating manner.

[0021] The rotating member 70 has a locating shaft 71 capable of being retained in the locating slot 22 of the upper chamber 14. The locating shaft 71 is provided with an inverted hook 72 corresponding in location to the retaining hook 21 of the locating slot 22. The rotating member 70 further has a rotary disk 73 which is provided in the bottom with an annular protrusion 75 having a recess 74 and corresponding in location to the protruded block 62 of the control member 60. The rotary disk 73 is provided in the top with an annular groove 76 and a plurality of locating pillars 77. The rotary disk 73 is further provided in the periphery with a plurality of locating edges 78.

[0022] The timing member 80 is formed of an orienting shaft 81, an upper frame 82, a lower frame 83, an intermittent gear set 84, and a torsion spring 85. The torsion spring 85 is disposed at the bottom of the lower frame 83 such that the inner end of the torsion spring 85 is fixed with the orienting shaft 81, and that the outer end of the torsion spring 85 is retained by a protruded plate 86 of the lower frame 83. The intermittent gear set 84 is pivoted to the pivoting pillars 87 located between the upper frame 82 and the lower frame 83. The orienting shaft 81 is provided with a center gear 88, which is engaged with the intermittent gear set 84. The bottom segment of the orienting shaft 81 is inserted into an orienting slot 79 of the orienting shaft 71. The locating pillars 77 of the rotary disk 73 are received in the locating holes 89 of the lower frame 83.

[0023] The rotary cap 90 is provided with a plurality of retaining slots 91 and is joined with the rotary disk 73 such that the locating edges 78 of the rotary disk 73 are retained in the retaining slots 91 of the rotary cap 90. The rotary cap 90 serves to shield the rotary disk 73 and the timing member 80.

[0024] The fastening portion 13 of the water discharging tube 12 and the water admitting tube 11 is provided with a fast dismantling device 92. The water discharging tube 12 and the water admitting tube 11 are provided with a radially-oriented guide slot 93 for disposing a locating plate 94 which is provided with a through hole 93 having a large diametrical portion 951 and a small diametrical portion 952. A joint 96 is provided with a large diametrical head 97 and a small diametrical slot 98, which are corresponding to the large diametrical portion 951 and the small diametrical portion 952 of the through hole 95 of the locating plate 94. As the locating plate 94 is slid upward, the large diametrical portion 951 is joined with the large diametrical head 97. As the locating plate 94 is slid downward, the small diametrical portion 952 of the locating plate 94 is retained in the small diametrical slot 98 of the joint 96, as illustrated in FIG. 9.

[0025] The press plate 63 of the control member 60 is further provided with a protuberance 65 opposite in location to the pivoting shafts 61 of the control member 60. The upper chamber 14 is provided with two stop plates 66 between which the protuberance 65 is confined.

[0026] The upper frame 82 of the timing member 80 is provided with a notched side 810 for joining a link plate 811. The link plate 811 is provided in one side with a protruded edge 812. When the orienting shaft 81 is kept in its original state, a stop plate 813 of the protruded edge 812 of the link plate 811 acts to stop the upper frame 82, thereby locating the orienting shaft 81 in motion.

[0027] When the rotary cap 90 is not set in a timing state, the protruded block 62 of the control member 60 is received in the recess 74 of the annular protrusion 75 of the rotating member 70, thereby causing the press plate 63 of the control member 60 to be raised. As a result, the top end of the control rod 40 is no longer pressed by the press plate 63 such that the control rod 40 is urged by the spring 53, and that the top of the water stopping membrane 30 seals off the bottom opening 31 of the inner chamber 17, thereby resulting in separation of the inner chamber 17 and the outer chamber 18 and interruption of water flow, as shown in FIGS. 4, 6, and 8. When the rotary cap 90 is so turned as to set in a timing state, the protruded block 62 of the control member 60 is pressed by the annular protrusion 75 of the rotary disk 73 such that the press plate 63 of the control member 60 is pressed downward, and that the top end of the control rod 40 is pressed by the press plate 63 of the control member 60 to slide downward, thereby resulting in formation of a gap between the top of the water stopping member 30 and the bottom opening 31 of the inner chamber 17, as shown in FIGS. 5, 7, and 8. The inner chamber 17 and the outer chamber 18 are no longer separated from each other. As the rotary cap 90 is turned, the torsion spring 85 is wound to provide the rotary cap 90 with a spring force enabling the rotary cap 90 to return to its original position. However, the returning of the rotary cap 90 to its original position is delayed by the intermittent gear set 84. 

I claim:
 1. A water flow timer comprising: a main body provided with a water admitting tube and a water discharging tube, which are provided with a fastening portion engageable with a water pipe, said main body further provided with an upper chamber and a lower chamber, with said lower chamber being provided with a water control tank which is located at a juncture of said water admitting tube and said water discharging tube and is divided into an inner chamber and an outer chamber, said inner chamber being provided with a through hole in communication with said upper chamber, said upper chamber being provided with at least two pivoting holes and a locating slot having a retaining hook; a water stopping membrane disposed at a bottom of said inner chamber and said outer chamber such that a top of said water stopping membrane removably seals off a bottom opening of said inner chamber, said inner chamber and said outer chamber being separated from each other or kept in communication with each other, said water stopping member being in an intimate contact with the inner wall of said water control rank; a control rod pivoted to the center of said water stopping membrane such that a top end of said control rod is jutted out of said upper chamber via said through hole of said inner chamber, said control rod being provided at a bottom end with a stop portion urging the underside of said water stopping membrane; a bottom cover acting to seal off the bottom of said lower chamber such that a top edge of a center tube of said bottom cover is located at the underside of said water stopping membrane, and that a spring is disposed between the underside of a center of said center tube and said stop portion of said control rod; a control member having two pivoting shafts and being pivoted in said upper chamber such that said two pivoting shafts are received in said two pivoting holes of said upper chamber, said control member being provided with a press plate which is provided in a top thereof with a protruded block and is located over the top end of said control rod, said control rod further provided with two elastic support arms which are disposed between said two pivoting shafts and said press plate such that said two elastic support arms are disposed across a slot opening of said locating slot of said upper chamber, thereby enabling said press plate to move up and down in a reciprocating manner; a rotating member having a locating shaft which is capable of being retained in said locating slot of said upper chamber, said locating shaft being provided with an inverted hook corresponding in location to said retaining hook of said locating slot, said rotating member further having a rotary disk which is provided in a bottom with an annular protrusion having a recess and corresponding in location to said protruded block of said control member, said rotary disk being provided in a top with an annular groove and a plurality of locating pillars, said rotary disk further provided in a periphery with a plurality of locating edges; a timing member formed of an orienting shaft, an upper frame, a lower frame, an intermittent gear set, and a torsion spring which is disposed at the bottom of said lower frame such that an inner end of said torsion spring is fastened with said orienting shaft, and that an outer end of said torsion spring is retained by a protruded plate of said lower frame, said intermittent gear set being pivoted to a plurality of pivoting pillars located between said upper frame and said lower frame, said orienting shaft being provided with a center gear which is engaged with said intermittent gear set; and a rotary cap provided with a plurality of retaining slots and joined with said rotary disk such that said locating edges of said rotary disk are retained in said retaining slots of said rotary cap, said protruded block of said control member being received in said recess of said annular protrusion of said rotating member at such time when said rotary cap is not set in a timing state, thereby causing said press plate of said control member to be raised such that the top end of said control rod is no longer pressed by said press plate of said control member, and that said control rod is urged by said spring, and further that the top of said water stopping membrane seals off said bottom opening of said inner chamber, thereby separating said inner chamber from said outer chamber, said protruded block of said control member being pressed by said annular protrusion of said rotary disk of said rotating member at such time when said rotary cap is set in a timing state, thereby causing said press plate of said control member to be pressed downward such that the top end of said control rod is pressed by said press plate of said control member to slide downward to result in formation of a gap between the top of said water stopping member and said bottom opening of said inner chamber, with said inner chamber being in communication with said outer chamber whereby said torsion spring is compressed to provide said rotary cap with a recovery force at such time when said rotary cap is turned.
 2. The water flow timer as defined in claim 1, wherein said water admitting tube and said water discharging tube are provided with a radially-oriented guide slot for disposing a locating plate which is provided with a through hole having a large diametrical portion and a small diametrical portion; wherein said main body is provided with a joint which is provided with a large diametrical head and a small diametrical slot whereby said large diametrical head is joined with said large diametrical portion of said locating plate at the time when said locating plate is slid upward, whereby said small diametrical portion of said locating plate is retained is said small diametrical slot of said join at the time when said locating plate is slid downward.
 3. The water flow timer as defined in claim 1, wherein said press plate of said control member is provided with a protuberance opposite in location to said pivoting shafts of said control member; wherein said upper chamber is provided with two stop plates between which said protuberance of said press plate of said control member is confined.
 4. The water flow timer as defined in claim 1, wherein said upper frame of said timing member is provided with a notched side for joining a link plate, said link plate being provided with a protruded edge whereby said protruded edge of said link stops said upper frame at such time when said orienting shaft of said timing member is set in an original state. 